Grinding roller manufacturing/remanufacturing abrasion-resistant material and preparation method thereof

Abstract

The invention discloses a grinding roller manufacturing / remanufacturing abrasion-resistant material and a preparation method thereof. A grinding roller is formed by a core roller body, a substrate abrasion-resistant layer, a transition layer and a roller face abrasion-resistant shape layer in a coupling mode. A core material is provided with the highly-abrasion-resistant modified boron-containing high-chromium cast iron substrate abrasion-resistant layer through casting and compounding. The substrate abrasion-resistant layer comprises, by mass, 1.75%-3.0% of C, 12.0%-18.0% of Cr, 0.2%-2.0% of B, 0.4%-0.8% of Mn, 0.4%-1.2% of Si, 0.30%-0.80% of Ni, 0.02%-0.04% of Mg, 0.03%-0.05% of Ce, 0.05%-0.10% of Ti, 0.006%-0.015% of N, 0-0.04% of S, 0-0.04% of P, and the balance Fe. Then surfacing of materials of the roller face abrasion-resistant shape layer is conducted on the surface of the transition layer. The roller face abrasion-resistant shape layer is formed by flux-cored wires through surfacing. The flux-cored wires comprises, by mass, 2.3%-3.5% of C, 14.0%-26.0% of Cr, 1.5%-2.0% of Ni, 0.8%-2.0% of Nb, 1.3%-2.0% of Mo, 1.2%-2.3% of Si, 1.0%-1.7% of Ti, 0.3%-1.0% of V, 0.2%-1.5% of B, 0-<0.007% of S, 0-0. 015% of P, and the balance Fe.

Description

technical field [0001] The invention relates to a grinding roller manufacturing / remanufacturing wear-resistant material and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] Grinding equipment is one of the important large-scale equipment widely used in mineral crushing and grinding processing in metallurgy, mining, cement, electric power, chemical industry, coal, building materials, ceramics and refractory materials. It is the key component and main wear and consumable part of the grinding equipment. The annual consumption in our country reaches more than 1.2 million tons. Therefore, seeking to improve the material of grinding rollers, increase their life, and reduce energy consumption and roller consumption has become a common goal pursued by scientific and technological workers in many fields, and has attracted attention from all over the world. Research and development of wear-resistant materials has become the focus ...

AI Technical Summary

Problems solved by technology

After processing, the workpiece often has carburization, carburization, and large roundness errors, and due to the stress and slag spots generated during the welding process, micro-cracks and holes appear in the weld layer, and the cracks expand during use. Blocks, peeling, short service life, generally about 8000 hours for one use; and when the wear-resistant layer of the surfacing welding wears to about 5mm or the phenomenon of falling blocks and peeling occurs, it is necessary to re-surfacing welding repair